Shortly after the events of the first movie, the dragons have finally come to live on Berk. Unfortunately they're a chaotic nuisance that constantly bothers the villagers and, frankly, everyone's getting sick of it. When local curmudgeon, Mildew, rallies up the village to force the "pesky dragons" out off the island, it's up to Hiccup and the rest of the Viking Teens to show them that although dragons are going to act within their nature, it can be used to the Viking's advantage.